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To open the mouth wide with a deep inhalation, usually involuntarily from drowsiness, fatigue, or boredom.
(verb-intransitive)
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To open wide; gape: The chasm yawned at our feet.
(verb-intransitive)
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To utter wearily, while or as if while yawning: yawned his disapproval of the silly venture.
(verb-transitive)
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The act of yawning.
(noun)
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A fatigued or bored response.
(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.